package com.itcast.demoone

import android.os.Bundle
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.itcast.demoone.adapter.MyAdapter

class RecyclerViewActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_recycler_view)
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
            insets
        }

        // 1. 获取控件
        val recyclerView = findViewById<RecyclerView>(R.id.recycler_view)
        // 2. 设置控件的管理选项
       /* recyclerView.layoutManager = LinearLayoutManager(
            this,
            LinearLayoutManager.HORIZONTAL,
             false
            )*/
        recyclerView.layoutManager = GridLayoutManager(this, 3)
        // 3. 造数据
        val items = List<String>(20) { "黑马 ${it + 1}" }

        // 4. 赋值适配器
        recyclerView.adapter = MyAdapter(items)
    }
}